To solve this problem, we need to understand the reaction between copper and concentrated nitric acid.$\\$When copper (Cu) is heated with concentrated $HNO_3,$ the reaction is as follows:$\\$The balanced chemical equation is:$\\ 3Cu + 8HNO_3 \rightarrow 3Cu(NO_3)_2 + 2NO_2 + 4H_2O \\$Explanation:$\\$• Copper reacts with concentrated nitric acid to form copper(II) nitrate $(Cu(NO_3)_2), \\$• Nitrogen dioxide $(NO_2)$ is produced as a brown gas.$\\$• Water $(H_2O)$ is also formed as a byproduct.$\\$Therefore, the products of the reaction are $Cu(NO_3)_2$ and $NO_2. \\$This corresponds to Option 1.